<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Database Quick Start : CodeIgniter User Guide</title>

<style type='text/css' media='all'>
@import url('../userguide.css');
</style>
<link rel='stylesheet' type='text/css' media='all'
	href='../userguide.css' />

<script type="text/javascript" src="../nav/nav.js"></script>
<script type="text/javascript" src="../nav/prototype.lite.js"></script>
<script type="text/javascript" src="../nav/moo.fx.js"></script>
<script type="text/javascript" src="../nav/user_guide_menu.js"></script>

<meta http-equiv='expires' content='-1' />
<meta http-equiv='pragma' content='no-cache' />
<meta name='robots' content='all' />
<meta name='author' content='ExpressionEngine Dev Team' />
<meta name='description' content='CodeIgniter User Guide' />

</head>
<body>

	<!-- START NAVIGATION -->
	<div id="nav">
		<div id="nav_inner">
			<script type="text/javascript">create_menu('../');</script>
		</div>
	</div>
	<div id="nav2">
		<a name="top"></a><a href="javascript:void(0);"
			onclick="myHeight.toggle();"><img
			src="../images/nav_toggle_darker.jpg" width="154" height="43"
			border="0" title="Toggle Table of Contents"
			alt="Toggle Table of Contents" /></a>
	</div>
	<div id="masthead">
		<table cellpadding="0" cellspacing="0" border="0" style="width: 100%">
			<tr>
				<td><h1>CodeIgniter User Guide Version 2.1.3</h1></td>
				<td id="breadcrumb_right"><a href="../toc.html">Table of
						Contents Page</a></td>
			</tr>
		</table>
	</div>
	<!-- END NAVIGATION -->



	<!-- START BREADCRUMB -->
	<table cellpadding="0" cellspacing="0" border="0" style="width: 100%">
		<tr>
			<td id="breadcrumb"><a href="http://codeigniter.com/">CodeIgniter
					Home</a> &nbsp;&#8250;&nbsp; <a href="../index.html">User Guide
					Home</a> &nbsp;&#8250;&nbsp; <a href="index.html">Database Library</a>
				&nbsp;&#8250;&nbsp; Database Example Code</td>
			<td id="searchbox"><form method="get"
					action="http://www.google.com/search">
					<input type="hidden" name="as_sitesearch" id="as_sitesearch"
						value="codeigniter.com/user_guide/" />Search User Guide&nbsp; <input
						type="text" class="input" style="width: 200px;" name="q" id="q"
						size="31" maxlength="255" value="" />&nbsp;<input type="submit"
						class="submit" name="sa" value="Go" />
				</form></td>
		</tr>
	</table>
	<!-- END BREADCRUMB -->


	<br clear="all" />


	<!-- START CONTENT -->
	<div id="content">


		<h1>Database Quick Start: Example Code</h1>

		<p>The following page contains example code showing how the
			database class is used. For complete details please read the
			individual pages describing each function.</p>


		<h2>Initializing the Database Class</h2>

		<p>
			The following code loads and initializes the database class based on
			your <a href="configuration.html">configuration</a> settings:
		</p>

		<code>$this->load->database();</code>

		<p>Once loaded the class is ready to be used as described below.</p>

		<p>
			Note: If all your pages require database access you can connect
			automatically. See the <a href="connecting.html">connecting</a> page
			for details.
		</p>


		<h2>Standard Query With Multiple Results (Object Version)</h2>

		<code>
			$query = $this->db->query('SELECT name, title, email FROM my_table');<br />
			<br /> foreach ($query->result() as $row)<br /> {<br />
			&nbsp;&nbsp;&nbsp;&nbsp;echo $row->title;<br />
			&nbsp;&nbsp;&nbsp;&nbsp;echo $row->name;<br />
			&nbsp;&nbsp;&nbsp;&nbsp;echo $row->email;<br /> }<br /> <br />
			echo 'Total Results: ' . $query->num_rows();
		</code>

		<p>
			The above
			<dfn>result()</dfn>
			function returns an array of <strong>objects</strong>. Example:
			$row->title
		</p>


		<h2>Standard Query With Multiple Results (Array Version)</h2>

		<code>
			$query = $this->db->query('SELECT name, title, email FROM my_table');<br />
			<br /> foreach ($query->result_array() as $row)<br /> {<br />
			&nbsp;&nbsp;&nbsp;&nbsp;echo $row['title'];<br />
			&nbsp;&nbsp;&nbsp;&nbsp;echo $row['name'];<br />
			&nbsp;&nbsp;&nbsp;&nbsp;echo $row['email'];<br /> }
		</code>

		<p>
			The above
			<dfn>result_array()</dfn>
			function returns an array of standard array indexes. Example:
			$row['title']
		</p>


		<h2>Testing for Results</h2>

		<p>
			If you run queries that might <strong>not</strong> produce a result,
			you are encouraged to test for a result first using the
			<dfn>num_rows()</dfn>
			function:
		</p>

		<code>
			$query = $this->db->query("YOUR QUERY");<br /> <br /> if
			($query->num_rows() > 0)<br /> {<br /> &nbsp;&nbsp;&nbsp;foreach
			($query->result() as $row)<br /> &nbsp;&nbsp;&nbsp;{<br />
			&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo $row->title;<br />
			&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo $row->name;<br />
			&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;echo $row->body;<br />
			&nbsp;&nbsp;&nbsp;}<br /> }
		</code>




		<h2>Standard Query With Single Result</h2>

		<code>
			$query = $this->db->query('SELECT name FROM my_table LIMIT 1');<br />
			<br /> $row = $query->row();<br /> echo $row->name;<br />
		</code>

		<p>
			The above
			<dfn>row()</dfn>
			function returns an <strong>object</strong>. Example: $row->name
		</p>


		<h2>Standard Query With Single Result (Array version)</h2>

		<code>
			$query = $this->db->query('SELECT name FROM my_table LIMIT 1');<br />
			<br /> $row = $query->row_array();<br /> echo $row['name'];<br />
		</code>

		<p>
			The above
			<dfn>row_array()</dfn>
			function returns an <strong>array</strong>. Example: $row['name']
		</p>


		<h2>Standard Insert</h2>

		<code>
			$sql = "INSERT INTO mytable (title, name) <br />
			&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;VALUES
			(".$this->db->escape($title).", ".$this->db->escape($name).")";<br />
			<br /> $this->db->query($sql);<br /> <br /> echo
			$this->db->affected_rows();
		</code>




		<h2>Active Record Query</h2>

		<p>
			The <a href="active_record.html">Active Record Pattern</a> gives you
			a simplified means of retrieving data:
		</p>

		<code>
			$query = $this->db->get('table_name');<br /> <br /> foreach
			($query->result() as $row)<br /> {<br />
			&nbsp;&nbsp;&nbsp;&nbsp;echo $row->title;<br /> }
		</code>

		<p>
			The above
			<dfn>get()</dfn>
			function retrieves all the results from the supplied table. The <a
				href="active_record.html">Active Record</a> class contains a full
			compliment of functions for working with data.
		</p>


		<h2>Active Record Insert</h2>

		<code>
			$data = array(<br />
			&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'title'
			=> $title,<br />
			&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'name'
			=> $name,<br />
			&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'date'
			=> $date<br />
			&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;);<br />
			<br /> $this->db->insert('mytable', $data); <br /> <br /> //
			Produces: INSERT INTO mytable (title, name, date) VALUES ('{$title}',
			'{$name}', '{$date}')
		</code>




	</div>
	<!-- END CONTENT -->


	<div id="footer">
		<p>
			Previous Topic:&nbsp;&nbsp;<a href="index.html">Database Class</a>
			&nbsp;&nbsp;&nbsp;&middot;&nbsp;&nbsp; <a href="#top">Top of Page</a>&nbsp;&nbsp;&nbsp;&middot;&nbsp;&nbsp;
			<a href="../index.html">User Guide Home</a>&nbsp;&nbsp;&nbsp;&middot;&nbsp;&nbsp;
			Next Topic:&nbsp;&nbsp;<a href="configuration.html">Database
				Configuration</a>
		</p>
		<p>
			<a href="http://codeigniter.com">CodeIgniter</a> &nbsp;&middot;&nbsp;
			Copyright &#169; 2006 - 2012 &nbsp;&middot;&nbsp; <a
				href="http://ellislab.com/">EllisLab, Inc.</a>
		</p>
	</div>

</body>
</html>